Featured Research

from universities, journals, and other organizations

Genomic diversity and admixture differs for stone-age Scandinavian foragers and farmers

Date:
April 24, 2014
Source:
Uppsala Universitet
Summary:
Scientists report a breakthrough on understanding the demographic history of Stone-Age humans. A genomic analysis of eleven Stone-Age human remains from Scandinavia revealed that expanding Stone-age farmers assimilated local hunter-gatherers, and that the hunter-gatherers were historically in lower numbers than the farmers. The transition between a hunting-gathering lifestyle and a farming lifestyle has been debated for a century. As scientists learned to work with DNA from ancient human material, a complete new way to learn about the people in that period opened up.

This image shows osteologists Ove och Evy Persson at Ajvide, Gotland, Sweden, 1983. The skeleton from a young woman dated to 2700 BC.
Credit: Göran Burenhult

An international team led by researchers at Uppsala University and Stockholm University reports a breakthrough on understanding the demographic history of Stone-Age humans. A genomic analysis of eleven Stone-Age human remains from Scandinavia revealed that expanding Stone-age farmers assimilated local hunter-gatherers and that the hunter-gatherers were historically in lower numbers than the farmers. The study is published today, ahead of print, in the journal Science.

Related Articles


The transition between a hunting-gathering lifestyle and a farming lifestyle has been debated for a century. As scientists learned to work with DNA from ancient human material, a complete new way to learn about the people in that period opened up. But even so, prehistoric population structure associated with the transition to an agricultural lifestyle in Europe remains poorly understood.

"For many of the most interesting questions, DNA-information from people today just doesn't cut it, the best way to learn about ancient history is to analyze direct data -- despite the challenges," says Dr. Pontus Skoglund of Uppsala University, now at Harvard University, and one of the lead authors of the study.

"We have generated genomic data from the largest number of ancient individuals" says Dr. Helena Malmström of Uppsala University and one of the lead authors. "The eleven Stone-Age human remains were between 5,000 and 7,000 years old and associated with hunter-gatherer or farmer life-styles" says Helena Malmström.

Anders Götherström, who led the Stockholm University team, is satisfied with the amount of DNA that they could retrieve.

"Not only were we able to generate DNA from several individuals, but we did get a lot of it. In some cases we got the equivalent of draft genomes. A population genomic study on this level with a material of this age has never been done before as far as I know."

The material used in the study is from mainland Scandinavia as well as from the Baltic island Gotland, and it comprises of hunter-gatherers from various time periods as well as early farmers.

Professor Mattias Jakobsson, who led the Uppsala University team, is intrigued by the results.

"Stone-Age hunter-gatherers had much lower genetic diversity than farmers. This suggests that Stone-Age foraging groups were in low numbers compared to farmers," says Mattias Jakobsson.

Jan Storå at Stockholm University shares Mattias' fascination.

"The low variation in the hunter gatherers may be related to oscillating living conditions likely affecting the population sizes of hunter-gatherers. One of the additional exciting results is the association of the Mesolithic individual to both the roughly contemporaneous individual from Spain but also the association to the Neolithic hunter-gatherers."

The study confirms that Stone-Age hunter-gatherers and farmers were genetically distinct and that migration spread farming practices across Europe, but the team was able to go even further by demonstrating that the Neolithic farmers had substantial admixture from hunter-gatherers. Surprisingly, the hunter-gatherers from the Baltic Sea displayed no evidence of introgression from farmers.

"We see clear evidence that people from hunter-gatherer groups were incorporated into farming groups as they expanded across Europe," says Pontus Skoglund. "This might be clues towards something that happened also when agriculture spread in other parts of the world."

"The asymmetric gene-flow shows that the farming groups assimilated hunter-gatherer groups, at least partly," says Mattias Jakobsson. "When we compare Scandinavian to central European farming groups that lived at about the same time, we see greater levels of hunter-gatherer gene-flow into the Scandinavian farming groups."

This study is part of the recently initiated "Atlas project" -- a large-scale genomic investigation of ancient human remains in Scandinavia led by Stockholm and Uppsala Universities and funded by the Swedish Foundation for Humanities and Social Sciences and the Swedish Research Council. The present study brings the first results from the project.

"We have only begun to scratch the surface of the knowledge that this project may bring us in the future" says Anders Götherström.


Story Source:

The above story is based on materials provided by Uppsala Universitet. Note: Materials may be edited for content and length.


Journal Reference:

  1. Skoglund et al. Genomic Diversity and Admixture differs for Stone-Age Scandinavian Foragers and Farmers. Science, 2014 DOI: 10.1126/science.1253448

Cite This Page:

Uppsala Universitet. "Genomic diversity and admixture differs for stone-age Scandinavian foragers and farmers." ScienceDaily. ScienceDaily, 24 April 2014. <www.sciencedaily.com/releases/2014/04/140424151807.htm>.
Uppsala Universitet. (2014, April 24). Genomic diversity and admixture differs for stone-age Scandinavian foragers and farmers. ScienceDaily. Retrieved December 22, 2014 from www.sciencedaily.com/releases/2014/04/140424151807.htm
Uppsala Universitet. "Genomic diversity and admixture differs for stone-age Scandinavian foragers and farmers." ScienceDaily. www.sciencedaily.com/releases/2014/04/140424151807.htm (accessed December 22, 2014).

Share This


More From ScienceDaily



More Fossils & Ruins News

Monday, December 22, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Researchers Bring Player Pianos Back to Life

Researchers Bring Player Pianos Back to Life

AP (Dec. 17, 2014) — Stanford University wants to unlock the secrets of the player piano. Researchers are restoring and studying self-playing pianos and the music rolls that recorded major composers performing their own work. (Dec. 17) Video provided by AP
Powered by NewsLook.com
Domestication Might've Been Bad For Horses

Domestication Might've Been Bad For Horses

Newsy (Dec. 16, 2014) — A group of scientists looked at the genetics behind the domestication of the horse and showed how human manipulation changed horses' DNA. Video provided by Newsy
Powered by NewsLook.com
Mozart, Beethoven, Shubert and Bizet Manuscripts to Go on Sale

Mozart, Beethoven, Shubert and Bizet Manuscripts to Go on Sale

AFP (Dec. 16, 2014) — A collection of rare manuscripts by composers Mozart, Beethoven, Shubert and Bizet are due to go on sale at auction on December 17. Duration: 00:57 Video provided by AFP
Powered by NewsLook.com
Old Ship Records to Shed Light on Arctic Ice Loss

Old Ship Records to Shed Light on Arctic Ice Loss

Reuters - Innovations Video Online (Dec. 15, 2014) — Researchers are looking to the past to gain a clearer picture of what the future holds for ice in the Arctic. A project to analyse and digitize ship logs dating back to the 1850's aims to lengthen the timeline of recorded ice data. Ben Gruber reports. Video provided by Reuters
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:

Strange & Offbeat Stories

 

Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins